BackboneJS - Event Trigger

Quiz

Description

It invokes the callback functions for the given events.

Syntax

object.trigger(event,[args])

Parameters

event − It binds an object.
args − It passes the values/arguments to the callback function.

Example

<!DOCTYPE html>
<html>
   
   <head>
      <title>Event Trigger Example</title>
      <script src="/?originalUrl=https%3A%2F%2Fcode.jquery.com%2Fjquery-2.1.3.min.js"
         type = "text/javascript"></script>
      
      <script src="/?originalUrl=https%3A%2F%2Fcdnjs.cloudflare.com%2Fajax%2Flibs%2Funderscore.js%2F1.8.2%2Funderscore-min.js"
         type = "text/javascript"></script>
      
      <script src="/?originalUrl=https%3A%2F%2Fcdnjs.cloudflare.com%2Fajax%2Flibs%2Fbackbone.js%2F1.1.2%2Fbackbone-min.js"
         type = "text/javascript"></script>
   </head>
   
   <body>
      <script type = "text/javascript">
         //Created an object 'myVal' and extended it using Backbone.Events method
         var myVal = _.extend({title:'TutorialsPoint!!!', site:'www.tutorialspoint.com'}, Backbone.Events);

         //The on() method will bind the callback function to an object
         myVal.on('myFunc', function () {
            document.write("The triggered value for site is: ");
            document.write(this.site); //value of site will get displayed by referring the current object
         });

         // The trigger() method triggers the 'myFunc' event on 'myVal'
         myVal.trigger('myFunc');
      </script>
      
   </body>
</html>

Output

Let us carry out the following steps to see how the above code works −

Save the above code in the trigger.htm file
Open this HTML file in a browser.

backbonejs_events.htm

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